Hi

I have been looking into building a full fledged app with Phoenix.
My idea is to keep things decoupled and simple from the start (helps maintainability in the long term).

My backend will be a JSON api, which will be consumed by a completely separate front end (built with VueJS).
I’ve been exploring Umbrella apps, which seems like a good idea. I can definitely see a lot of problems it will solve (maintenance overhead, communication etc.)

In the end, my app will have services provided by each microservice, and each microservice will communicate with other microservices. My question is, should I start big (one monolithic app, and use Umbrella later to split) or incorporate an Umbrella structure right now?

I cannot seem to find a lot of resources on creating proper Umbrella apps based on Phoenix, but it is looking as if getting an Umbrella structure comes with complexity:

• Should I have a central single interface to the database (for all apps)? If yes, how do we deal with a large number of schema modules here? (which could come in the future)
• Are there any other potential pitfalls with this Umbrella design?